Lawn edge trimmer



Aug. 16, 1949. P. BECKER LAWN EDGE TRIMMER Filed April 14, 1947 @www5 Patented Aug. 16, 1949 UNITED STATES PATENT OFFICE LAWN EDGE TRIMMER Louis P. Becker, Altoona, Pa.

Application April 14, 1947, Serial No. 741,404

1 Claim. l This invention relates to lawn edge trimmers. An object of this invention is to provide a trimmer for the edge of a lawn about a walk or the like, which is adapted to be pushed along the walk and which will cut any overhanging grass.'

Another object of this invention is to provide a lawn edge trimmer which includes a traction wheel adapted to roll over the edge of the walk, having a cutter fixed thereto, and a second cutter rotatable reversely from the first cutter.

A further object of this invention is to provide an edge trimmer of this kind wherein the cutters are formed of tapered blades so that the grass will not be pushed outwardly but will be cleanly out by the blades.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawingsV and specication, and then more particularly pointed out in the appended claim.

In the drawing,

Figure 1 is a detail side elevation, partly broke away, of a lawn edge trimmer constructed according to an embodiment of this invention,

Figure 2 is an enlarged fragmentary sectional view taken on the line 2-2 of Figure 1.

Referring to the drawing, the numeral I designates generally an elongated handle which has secured to the lower end thereof a fork I I, which includes a bushing I2 secured by fastening means I3 to the handle I0, and also includes a pair of elongated arms I4. l

A traction wheel I5 is rotatably mounted on a shaft I 6 which is xed between the lower ends of the arms III. The shaft I6 is provided with reduced studs I'I at the opposite ends thereof, which are exteriorly threaded and upon which lock nuts I8 are secured. An inner cutter generally designated as I9 is iixed by means of bolts 2n to the traction wheel I5. The inner cutter I9 includes a plurality of outwardly tapered radially disposed blades 2I formed integral with a central plate 22.

An outer cutter 23 is disposed in face abutting relation to the inner cutter I9, and includes a central plate 24 having extending therefrom a plurality of radially disposed blades 25 which are formed with curved opposite keen edges 29.

In order to provide for rotation of the outer cutter 23 in the direction opposite or reversely from the inner cutter I9, I have provided a ring gear 21 which is fixed by fastening members 28 to the outer side oi' the outer cutter 23. A sun gear 29 is fixed relative to the inner cutter I9, being secured relative to the cutter I9 and to the traction wheel I5 by the common securing bolts 20. An intermediate gear 30 is rotatably carried by a stub shaft 3I iixed to one of the fork arms III. The intermediate gear 30 meshes with the ring gear -2'I and the sun gear 29 and thereby 60 2 provides for reverse rotation of the outer cutter 23 with respect to the inner cutter I 9.

The sun gear 29 is formed with an inwardly offset boss 32 which forms a bearing for the outer cutter 23. A spring washer 33 is interposed between the sun gear 29 and the outer cutter 23 and provides for holding the outer cutter 23 under tension in face abutting relation to the inner cutter I9.

In the use and operation of this device the traction wheel I 5 is engaged with the walk at one edge thereof. The irmer cutter I9 which projects a substantial distance beyond the periphery of the traction wheel I5 will cut into the ground at the edge of the Iwalk and as the wheel I5 and the cutter I9 rotate in a clockwise direction, the outer cutter 23 will be rotated in a counterclockwise direction through the medium of the gear train formed by the gears 21. 29 and 30.

By providing the cutting blades 2| and 25 with convex opposite keen edges, the blades of grass and roots or the like which will be engaged by this trimmer will be quickly and cleanly cut without causing the blades to push the heavier or thicker diameter material outwardly from between the blades.

I do not mean to connue myself to the exact details of construction herein disclosed, but claim al1 variations falling within the purview of the appended claim.

What I claim is:

A lawn edge trimmer comprising a traction wheel, a forked handle, a shaft for said wheel iixed to said handle between the arms of the fork thereof, a cutter iixed to said wheel and projecting therefrom, a sun gear iixed relative to said wheel and said cutter, a hub carried by said sun gear, a second cutter disposed in face abutting relation to said first cutter and rotatably engaging about said hub, a ring gear fixed to said second cutter, and an intermediate gear rotatably carried by one arm of the fork of said handle and meshing with said sun and ring gears to thereby roie said second cutter reversely from said nrst cu r.

LOUIS P. BECKER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,472,587 Crowder Oct. 30, 1923 FOREIGN PATENTS Number Country Date 15,379 Great Britain 1908 15.058 Australia 1928 

